In "Blessing of Many Fractures," Joy mentions hiring a private investigator to follow her board members:
JOY: I hired a private investigator a while ago to start digging. She was worth every penny…when she was sober.
This certainly sounds similar to Jessica Jones (PI, female, drinks), but could also match a bunch of other PIs (not everything in the MCU needs to be an easter egg).
Is there any definite evidence (interviews, etc) that this is a reference to Jessica Jones?